ETC5543 – Business Analytics Creative Activity
19 October 2025
Figure 2
feasts features capture curve shape (ACF/PACF/STL) to encode smoothness, periodicity, and slope changes.(treat each fish’s FRC as a short time series)H2O AutoML() across Stack ensemble/GBM / DL / XGBoostPre-processing (used by the RNN):
Size-standardise each fish to 450 mm with offset_dB = 10*log10(450/length)
Convert F45–F170 from dB → linear backscatter: exp((dB + offset_dB)/10)
Grouped splits by fishNum (train / valid / test)
| Model | Acc @ 0.50 | Acc @ Policy |
|---|---|---|
| RNN (reproduction on 5-ping blocks) | 0.593 | — |
| AutoML (per-ping, original data) | 0.668 | 0.663 |
Four variants
| Variant | Acc @ 0.50 | Acc @ Policy |
|---|---|---|
| QUINTILES_ALLFREQ | 0.883 | 0.867 |
| QUINTILES_FEATS | 0.633 | 0.750 |
| MEDIAN_ALLFREQ | 0.917 | 0.833 |
| MEDIAN_FEATS | 0.667 | 0.750 |
tsfeatures/feastsEvery fish leaves a sonic fingerprint.
Our job is to read it.
Fish Hydroacoustics — ETC5543
ETC5543 — Fish Hydroacoustics